<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>                                                         
                </div>    
            </div>   
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div 
                        class="button-wrapper" 
                        v-for="item of hot" 
                        :key="item.id"
                        @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>            
                </div>  
            </div>   
            <div 
                class="area" 
                v-for="(item, key) of cities" 
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div 
                        class="item border-bottom" 
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)"
                    >
                        {{innerItem.name}}   
                    </div>     
                </div>
            </div>   
        </div>              
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex' 
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter: String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        }) 
    },
    methods: {
        handleCityClick (city) {
            // this.$store.commit('changeCity', city)
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations (['changeCity'])
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch: {
        letter () {
            if(this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color: #ccc
        &:after
            border-color: #ccc 
    .border-bottom
        &:before
            border-color: #ccc   
    .list  
        overflow hidden
        position absolute
        top: 1.58rem
        left: 0
        right : 0
        bottom : 0
        .title
            line-height : .54rem
            background : #eee
            padding-left : .2rem
            color : #666
            font-size : .26rem
        .button-list
            overflow hidden
            padding : .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width : 33.33%
                .button
                    padding  : .1rem 0
                    margin : .1rem
                    text-align : center
                    border: .02rem solid #ccc
                    border-radius : .06rem
        .item-list
            .item
                line-height : .76rem      
                padding-left : .2rem       
</style>